package com.heima.kafka.sample;

import org.apache.kafka.clients.producer.*;

import java.util.Properties;

/**
 * 生产者
 */
public class ProducerQuickStart {

    public static void main(String[] args) {
        //1.kafka的配置信息
        Properties properties = new Properties();
        //kafka的连接地址
        properties.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG,"192.168.200.130:9092");
        //发送失败，失败的重试次数
        properties.put(ProducerConfig.RETRIES_CONFIG,5);
        //消息key的序列化器
        properties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");
        //消息value的序列化器
        properties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,"org.apache.kafka.common.serialization.StringSerializer");
        //ack配置。消息确认机制
        properties.put(ProducerConfig.ACKS_CONFIG,"all");
        //重试次数
        properties.put(ProducerConfig.RETRIES_CONFIG,10);
        //数据压缩
        properties.put(ProducerConfig.COMPRESSION_TYPE_CONFIG,"snappy");
        //2.生产者对象
        KafkaProducer<String,String> producer = new KafkaProducer<String, String>(properties);

        //封装发送的消息
        for (int i = 0; i < 5; i++) {
            ProducerRecord<String,String> record = new ProducerRecord<String, String>("itcast_topic_input","hello kafka");
            producer.send(record);
        }

       /* //3.发送消息
        //异步发送消息
        producer.send(record, new Callback() {
            @Override
            public void onCompletion(RecordMetadata metadata, Exception e) {
                if (e!=null) {
                    System.out.println("记录异常信息到日志表中");
                }
                System.out.println(metadata.offset());
            }
        });*/

        //4.关闭消息通道，必须关闭，否则消息发送不成功
        producer.close();
    }

}